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Comparing datasets

Example: Compare beak sizes of 751 Daphne Island finches with 43 Santa Cruz Island finches. Comparing datasets. Example: Compare beak sizes of 751 Daphne Island finches with 43 Santa Cruz Island finches. Set vertical scales to be the same.

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Comparing datasets

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  1. Example: Compare beak sizes of 751 Daphne Island finches with 43 Santa Cruz Island finches. Comparing datasets

  2. Example: Compare beak sizes of 751 Daphne Island finches with 43 Santa Cruz Island finches. Set vertical scales to be the same

  3. Example: Compare beak sizes of 751 Daphne Island finches with 43 Santa Cruz Island finches. Use common set of bins

  4. Find a common range: • Find the larger of the two data set maxima • Find the smaller of the two data set minima • Subtract this smallest value from this largest value • Bin both data sets using the same bin positions in the common range • Experiment with number of bins to make both histograms look reasonable How to get a common set of bins

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